Insulator and bracket.



E. E. JOHNSON.

INSULATOR AND BRACKET.

APPLICATION FILED MAY9. I918.

Patented Nov. 5, 1918.

2 SHEETS-SHEET l EWALD E. Jam/50m.

E. E. JOHNSON.

INSULATOR AND BRACKET.

APPLICATION FILED MAY9. 1918. 1,284,110. I 1

2 SHEETS-SHEET 2.

I\ T R Q (O W) \\N \v' i m IMVENTQE 5mm E1 110mm; 7

Patented Nov. 5, 1918.

EWALD E. JOHNSON, .OF ST. CHARLES, ILLINOIS.

INSULATOR AND BRACKET.

Specification of Letters Patent.

Patented Nov. 5, 1918.

application filed May 9, 1918. Serial No. 233,443.

To all whom it may concern:

Be it known that I, EWALD E. JOHNSON, of St. Charles, in the county of Kane and State of Illinois, a citizen of the United States, have invented certain new and useful Improvements in Insulators and Brackets, of which the following is a specification.

My invention relates to insulators and brackets for supporting the same, and more particularly to a structure adapted for use in connection with the dead end ofan electric circuit wire, such for example, as the dead end of a power line, or telephone or telegraph wire.

Heretofore it has been the usual practice to mount the insulator upon a vertical pin that is screwed into a suitable cross-arm upon the upper end of a pole. This structure is not dependable when employed at the dead end of the wire, for the reason that. there is'a considerable pull 111 one direction only upon the pin, causing it to either snap or break off, or split the cross arm, and eventually become dismantled. It is an ob ject of my invention to overcome this inherent objeption to the vertical mounting of the insu ator pin upon the top of the cross-arm and to provide a bracket that will support the insulator and pin so that thepull from the dead end of the wire will be laterally in a horizontal direction against the cross-arm. It is also an object of my invention to provide a bracket whereby the insulator may be readily attached to or mounted upon the cross-arm without the necessity of having to bore the latter to fit the insulator pin therein. A further object of my invention is the provision of a novel insulator that is so constructed as to avoid, to a certain extent, the leakage of the current in rainyor wet weather.

Other objects of my invention will be obvious to persons skilled in this art, among which is the provision of a device of this character that is dependable in operation, readily mountable upon the structure adapted to support it, and comparatively inexpensive to manufacture. I prefer to accomplish the divers objects of my invention in substantially the manner hereinafter fully described and as more particularly pointed out in the clain ference being now had to the accon'i .ng drawings forming part of this spe ion, in which,

Figure 1 is a vertica n of my invention mounted upon 1 of a cross arm, the insulator being partly in section to more clearly illustrate its particular construction.

Fig. 2 is a fragmental section of a slightly modified form of my insulator.

Fig. 3 is a view similar to Fig. 1, of a slightly modified construction of my bracket.

Referring to the drawings, it will be observed my invention preferably comprises a bracket consisting of horizontally disposed parallel arms 5 and 6, that are spaced apart a distance corresponding to substantially the vertical dimension of the cross-arm 7 to which it is adapted to be attached, and the outer ends of these arms are bored vertically to accommodate a headed bolt 8, the purpose of which will hereinafter more fully appear. The opposite or inner ends of these parallel arms are bent at substantially right-angles to themselves to provide lateral members 9 and 10, that project respectively upwardly and downwardly from the upper and lower surfaces of the cross-arm spacer plate 11 of substantially U-sliape is riveted or otherwise secured to the facing surfaces of the arms 5 and 6, in order to space the said arms a proper distance apart to accommodate them to the vertical dimension of the cross arm 7, said spacer 11 being adapted to abut against one of the vertical faces of said cross-arm.

The means for clamping the bracket upon the support or cross-arm comprises a backplate 12 that is secured in any suitable manner, preferably by bolts 13, and nuts 14, to the flanges 9 and 10 respectively, of the par allel arms. By mounting the bracket in the manner above described, the outer spaced ends which carry the vertical pin 8 are disposed a distance away from the side of the cross-arm and any horizontal pull upon the pin 8 will be transmitted through the arms 5 and 6 tothe back-plate 12 and there be exerted against the face of the cross-arm and not be a torsion or twisting from the lever pull as is the case where a pin is tapped into the top of the body of the crossarm in the usual way.

'fhe insulator preferably comprises a body 15, of porcelain or the like, that is provided with a central bore 16, through which the bolt 8 is adapted to pass for the purpose of mounting the insulator between the outer ends of the arms 5 and 6. llhe upper portion of the insulator comprises a mushroomder surface with two or more petticoats 18 and 19. The lower portion of the insulator comprises an outwardly flaring skirt 20 beneath which is provided one or more similar petticoats 21, and the stem or mount consists of an integrally formed tubulan lower extension 22 that is of a length sufficient to support the insulator body a proper distance above the lower arm 6. The portion of the insulator body intermediate the hood and the skirt is preferably ribbed or fluted in cross-section, as shown at 23 in the drawings, for the purpose of lacing or winding the circuit wires about the same. The provision of two or more petticoats, so fa as I am aware, is novel and it is for the purpose of providing a plurality of drip-shoulders that will cause the water or moisture to drip therefrom and thereby prevent the moisture from extending continuously over the surface of the insulator from the conductor to the crossarm through the pin and from thence to the ground thereby pern'iitting a leakage of the current.

I may modify the structure of the insulator by making the supporting tube 22 of the preferred form in the 'shape of a separate metal tube or porcelain tube, as shown at 24 in the drawings. This may be found more expedient as it will avoid the liability of crushing or breaking the tubular porcelain support when made in one piece with the insulator body. In Fi 3 I have shown a slightly modified form of bracket in which the horizontal parallel arms 25 and- 26 of the frame are connected at their inner ends by a transverse vertical web 27, which gives this structure a U-form. The upper arm 25 is given an angular bend at 28, which permits the top of the cross-arm 29 being given a crown or ridge 30 to more readily shed the water and moisture. In this form, the clamping action is secured by an intermediate cross or tie-bolt 31, located adjacent one of the vertical sides of the cross-arm and connecting the upper and lower arms 25 and 26. The insulator is mounted in the outer ends of the arms in the same manner as in the structure illustrated in Fig.1. It will be obvious that other modifications may be made without materially departing from the spirit of my invention as expressed in the appended claims. I therefore desire it understood that all such changes are contemplated within the scope of my claims.

hat I claim is:

1. A bracket for insulators comprising two parallel arms the inner ends whereof are bent laterally to themselves, a U-shaped spacer connecting said arms intermediate their ends, a clamping plate bolted to the lateral ends of said arms, and an insulatorcarrying pin mounted in and connecting the outer free ends of said arms.

2. A bracket for insulators comprising two parallel arms, a spacer connecting said arms intermediate their ends, a clamping plate adapted to clamp said space against a supporting cross-arm, and means adapted to mount an insulator between the outer ends of said parallel arms.

3. A bracket for insulators comprising two parallel arms, a U-shaped spacer the parallel members whereof are secured to said arms intermediate the ends of the latter, a clamping plate adapted to clamp said spacer against a supporting cross-arm, and means adapted to mount an insulator between the outer ends of said parallel arms.

4. The combination with a suitable crossarm, of means for mounting the dead end of a wire thereon comprising a pair of parallel metal arms disposed upon the top and bottom of said cross-arm, a spreader intermediate the ends of said parallel arms, a plate parallel with said spreader adapted to clamp said structure to said cross-arm, a transverse pin mounted in the outer ends of said parallel arms, and an insulator carried by said pin and provided with a lower extension adapted to rest upon said lower parallel arm.

Signed at St. Charles, county of Kane and State of Illinois, this 29th day of April,

EVVALD E. JOHNSON. \Vitnesses J. B. T. lVHEELER, GLADYS MOORE CLARKE. 

